Direct-acting gas-engine.



-PATENTED AUG.-18, 190s.

P. GERVAIS.

DIRECT ACTING GAS ENGINE.

APPLICATION FILED JAN. 2. 1902.

4 SHEETSSHEET 1.

N0 MODEL.

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No. 736,715. PATENTED AUG. 18, 1903.,

P. GERVAIS. 1

DIRECT ACTING GAS ENGINE.

APPLICATION FILED JA N. 2, 1902.

4 SHEETS-SHEET 3.

N0 MODEL.

WITNESSES IN l/EN TOR mu s.

PATENTED AUG. 18,1903.

. P. GERVAIS.

DIRECT ACTING GAS ENGINE. APPLIGATION FILED JAN. 2', 1902.

N0 MODEL.

4 SHEETS-SHEET 4.

WITNESSES WZW A TTOHNEYS.

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Patented August 18, 1903.

PATENT Urricn,

PAUL GERVAIS, OF SEEBURG, GERMANY.

DIRECT-ACTING GAS-ENGINE.

SPECIFICATION forming part of Letters Patent No. 736,715, dated August18, 1903.

Application filed January 2, 1902. Serial No. 88,078. (No model.)

To all whom it may concern.-

Be it known that 1, PAUL GERVAIS, a subject of the King of Prussia,Emperor ofGermany, residing at Seeburg, in the Kingdom of Prussia,Germany, have invented Improvements in Direct-Acting Gas-Engines, ofwhich the following is a specification.

This invention relates to improvements in gas-engines of the rotaryclass in which the motive parts are impelled. by a continuous supply ofthe actuating fluid or products of combustion.

The object of the invention is to provide a device of such constructionthat will accomplish a constant and even actuation of the turbine.

To this end the invention consists of a gasengine comprising twinexplosion-cylinders, gas-supply pipes therefor, means for alternatingthe supply of gas to the cylinders, double receiving-chambers, separatecommunicating means between said cylinders and chambers, means fordirecting the product of combustion alternately in said communicatingmeans, and a turbine to be actuated by the product of combustion, aswill be more fully described hereinafter and .finally pointed out in theclaim.

In the accompanying drawings, Figure 1 is a vertical longitudinalsection of the engine on line A A, Fig. l. Figs. 2 and 3 are respectively plan and side views of the device;-

and Fig. 4. is a vertical transverse section on line B B, Fig. 3.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, a a represent the twin explosion-cylindersthat are arranged parallel to each other, inclosed at one end by theplate I), and each at the opposite end is provided with the shut-offvalve 0, that is maintained in closed position by its own weight. Theoil-supply pipe (1 is divided to communicate with the cylinders throughthe valves 6 e. Communication from the endsf of the cylinders to thechamber gis had when the valves 0 are open. The receiving-chambers 72 '5are cylindrical and arranged concentrically, the latter within theformer. The

receiving-chamber h communicates with the chamber g, while thereceiving-chamber z communicates with the explosion-cylinders a athrough the pipe q and the valves pp at the upper end of the pipe q,that branches laterally. Through the center of the receiving-chambers isarranged the power-shaft 76, upon which atone end in the exhaust-chamberthe turbinelis mounted and at the opposite end the pulley 00, and aroundthe shaft 717, within the cylinder t', is arranged the inclosing tubeThe receiving-chambers are separated from the exhaust-chamber n by thepartition m. The partiti0nwall m is provided with the diametricalopenings r,through which the products of combustion escape from thechamber '0' to act upon the turbine Z, while through the openings 0* theproducts of combustion escape from the receiving-chamber h to act uponthe turbine, and after acting upon the turbine they escape from theexhaust-chamber at through the exhaust-pipe o.

The explosions of the gas in the twin cylinders take place alternately,and for this reason the valves 6 and e are actuated alternately. Toaccomplish this, a cam mechanism is provided at one side of the device,a separate cam for actuating each valve 6 e p These cams s s s s aremounted upon the shaft 4), that is actuated by means of the gear-wheelsw of the train of gears that is actuated from the power-shaft k. Uponthe cams rest the levers t, that are connected with the valves by therods to. In the operation of the device the combustible gas or fluid issupplied to one of the combustionchambers, preferably a for the purposeof illustration, through the pipe d when the valve (2 is actuated by thecam .9 When a sufficient quantity of combustible fluid or gas hasentered the combustion-chamber a, ignition takes place by means of theigniter y. Upon explosion the valve 0 is forced open and the expandinggas enters the receiving-chamber it through the chamber 9; but beforethe products of combustion are entirely exhausted from theexplosion-chamher a combustible gas or fluid is fed to thecombustionchamber a by the actuation of its valve and explosion takesplace, the expansive force of which acts upon the valve 0 of theexplosion-chamber a and closes the same. Upon the second explosion andthe closing of the valve 0 of the chamber a the product of combustionconfined in said cylinder escapes through the valve 10, actuated by thecam s, to be conveyed through the pipe q to the receiving-chamber 2'. Inthis manner by the alternate explosions in the explosion-chambers a athe products of combustion are conveyed to the receiving-chambers h 'iby the alternate closing and opening of the valve 0 and valves p 19. Bythis construction the products of combustionare conveyed directlythrough the chambers g and h to act upon the turbine Z and indirectlyfrom the explosion-cylinders through the tube q and the chamber 1' toact upon the turbine Z, after which the products of combustion passthrough the exhaust-chamber n and out of the exhaust pipe 0. Theexplosions are adapted to take place at frequent intervals and by thedirect and indirect play of the products of combustion upon the turbinecauses a continuous and rapid actuation thereof, so that high speed andpower is attainable.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- -In a rotarygas-engine, the combination of twin explosion-cylinders, a shut-offvalve provided for each cylinder, separate receivingchambers, separatemeans communicating from said cylinders to said receiving-chambers,spring-actuated valves for controlling the supply of gas to saidcylinders, springactuated valves for permitting the escape of a portionof the products of combustion to one of said receiving-chambers, a cammechanism for actuating alternately said spring actuated valves, saidshut-0E valves being opened and closed alternately by the explosion ofthe gas, a turbine, means for directingcontinuous supply of the productsof combustion upon said turbine, and an exhaust,

substantially as set forth.

In witness whereof I have hereunto set my 45 hand in presence of twowitnesses.

PAUL GERVAIS. Witnesses:

HENRY HASPER, WOLDEMAR HAUPT.

